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Drainage Reports - 02/22/2013 (2)
A This Drainage Report is consciously provided as a PDF. Please consider the emironment before pringng this document in its entirety. When a hard copy is absolutely necessary, we recommend double -sided printing. February 12, 2013 I I City of Ft. Collins Approved Plans Approved By Date Prepared for: Blue Ocean Enterprises 416 West Oka Street Fort Collins, CO 80525 Prepared by: NORTHERN ENGINEERING 200 South College Avenue, Suite 10 Fort Collins, Colorado 80524 Phone: 970.221.4158 Fas: 970.221.4159 v .nonhernengineenng.corn Project Number: 838-002 NorthernEngineering.com !I 970.221.4158 I 1 1 1 [1 1 ■� NORTHERN ENGINEERING February 12, 2013 Blue Ocean Enterprises 416 West Oak Street Fort Collins, CO 80525 RE: Stormwater Management Plan Canyon Place To Whom It May Concern: ADDRESS: PHONE: 970.221.4158� 200 S. College Ave. Suite 10 WEBSorthernengi n er ng com Fort Collins, CO80524 FAX:970.221.4159 Northern Engineering Services, Inc. is pleased to submit this Stormwater Management Plan for Canyon Place. This report outlines Best Management Practices (BMPs) to be implemented with the proposed construction in order to minimize potential pollutants in stormwater discharges. We have prepared this report to accompany the Colorado Department of Public Health and Environment General Permit for Stormwater Discharge Associated with' Construction Activities (aka, Stormwater Discharge Permit or SDP). The General Permit No. for this SDP is (to be filled -in by permittee) and the Certification No. for this SDP is (to be filled -in by permittee). The Permit Certification is Effective beginning (to be filled -in by permittee), and initial certification expires (to be filled -in by permittee). A copy of the issuance cover letter can be found in the Appendix D of this document (to be provided by permittee). Please note: this Stormwater Management plan (including the Site Maps) is not a static document. It is a dynamic device that should be kept current and logged as construction takes place. As such, this version was prepared to facilitate initial plan approvals and permitting, but does not necessarily reflect the final version, or the transitions throughout the construction process. As the site develops and changes, the Contractor is expected and encouraged to make changes to what is contained herein so that the SWMP works as effectively and efficiently as possible. It shall be the responsibility of the SWMP Administrator and/or the permit holder (or applicant thereof) to ensure the plan is properly maintained and followed. If you should have any questions or comments as you review this report, please feel free to contact us at your convenience. Sincerely, ' 1401RHERN ENGINEERING SERVICES, INC. N" vV. Nicholaws PE LEE AP Pf ■� NORTHERN ENGINEERING Canyon Place TABLE OF CONTENTS Vicinity Map I 1.0 General Requirements..............................................................................................1 1.1 Objectives ...............................................................................................................1 1.2 SMWP Availability ...................................................................................................1 1.3 Definitions..............................................................................................................1 1.4 Additional Permitting................................................................r...............................1 ' 2.0 Narrative Site Description.........................................................................................2 2.1 Existing Site Description............................................................................................2 2.2 Nature of Construction Activity...................................................................................2 ' 2.3 Sequence of Major Activities......................................................................................2 2.4 Site Disturbance......................................................................................................2 ' 2.5 2.6 Existing Data...........................................................................................................2 Vegetation Existing ...................................................................................................3 2.7 Potential Pollution Sources........................................................................................3 ' .2.8 Non-stormwater discharges.......................................................................................3 2.9 Receiving Waters ........................................ '............................................................. 4 3.0 Stormwater Management Controls.............................................................................4 ' 3.1 SWMP Administrator................................................................................................4 3.2 Best Management Practices (BMP's) for Stormwater Pollution Prevention .........................4 ' 3.3 Structural Practices for Erosion and Sediment Control....................................................5 3.4 Non -Structural Practices for Erosion and Sediment Control.............................................7 3.5 Phased BMP Installation...........................................................................................9 ' 3.6 Material Handling and Spill Prevention......................................................................10 3.7 Dedicated Concrete or Asphalt Batch Plant................................................................11 ' 3.8 Vehicle Tracking Control.........................................................................................11 3.9 Waste Management and Disposal.............................................................................11 3.10 Groundwater and Stormwater Dewatering..................................................................11 4.0 Final Stabilization and Long -Term Stormwater Management.......................................12 4.1 Final Stabilization..................................................................................................12 ' 4.2 Long -Term Stormwater Management.........................................................................12 5.0 Inspection, Maintenance and Record Keeping...........................................................12 5.1 BMP Inspection.....................................................................................................12 ' 5.2 BMP Maintenance.................................................................................................12 5.3 Record Keeping.....................................................................................................13 ' 6.0 References Additional SWMP and BMP Resources.....................................................................15 16 1 Stormwater Management Plan NORTHERN ENGINEERING Canyon Place LIST OF TABLES: Table 1 — Preliminary Permit and Construction Schedule........................................................ 10 APPENDIX A — Site Maps APPENDIX B — Erosion Control Details APPENDIXC — Landscape Plan APPENDIX D — Copies of Permits/Applications APPENDIX E — Inspection Logs APPENDIX F — Contractor Inserts (as needed) APPENDIX G — Contractor Inserts (as needed) R Stormwater Management Plan I I W I NORTHERN ENGINEERING Canyon Place ' 1.0 General Requirements 1.1 Objectives ' The objective of a Stormwater Management Plan (SWMP) is to identify all potential sources of pollution likely to occur as a result of construction activity associated with the site construction, and to describe the practices that will be used to reduce the pollutants in stormwater discharges from ' the site. The SWMP must be completed and implemented at the time the project breaks ground, and revised as necessaryas construction proceeds to accurately reflect the conditions and practices at the site. ' This report summarizes the Stormwater Management Plan for the construction activity that will occur with Canyon Place in Fort Collins, CO. This plan has been prepared according to regulations of the Colorado Department of Public Health and Environment (CDPHE), Water Quality Control Division. 1.2 SMWP Availability ' This report is intended to remain on the aforementioned construction site to allow for maintenance and inspection updates, and for review during inspection. ' 1.3 Definitions BMP.— Best Management Practice encompassing a wide range of erosion and sediment control practices, both structural and non-structural in nature, which are intended to reduce or eliminate ' any possible water quality impacts from stormwater leaving a construction site. Erosion Control BMPs — Practices that PREVENT the erosion of soil, such as minimizing the amount of disturbed area through phasing, temporary stabilization, and preserving existing vegetation. ' Sediment Control BMP's — Practices to REMOVE sediment from runoff, such as sediment basins, silt fence, or inlet protection. Non-structural BMP's — The implementation of methods, practices, and procedures to minimize ' water quality impacts, such as the preservation of natural vegetation, preventive maintenance and spill response procedures. ' Structural BMP's — Physical devices that prevent or minimize water quality impacts, such as sediment basins, inlet protection, or silt fence. ' 1.4 Additional Permittine As mentioned above, this Stormwater Management Plan is associated with the Colorado Department of Public Health and Environment Stormwater Permit that is issued by the Water ' Quality Control Division of the CDPHE. Additional Environmental permitting not described in this report may be required as a part of this project. An example is the Construction Dewatering Permit for groundwater. Another example is the Air Pollution Emission Notice (APEN). The CDPHE website contains links to both of these permits, as well as many other potential permits. The ' Contractor is responsible for ensuring the proper permits are acquired. Stormwater Management Plan I ■� (NORTHERN ENGINEERING Place ' 2.0 Narrative Site Description 2.1 Existing Site Description The project site is located in Section 11,;Township 7 North, Range 69 West of the 6th Principal; Meridian, in the City of Fort Collins, Larimer County, Colorado. The existing site is fully developed with a vacant office building on the southeast corner (Lot 1 — 400 W. Magnolia Street), an office. building on the southwest corner (Lot 1 — 318 Canyon Avenue), and a bank building on the east ' (Lot 2 — 319. S. Meldrum Street), and associated asphalt parking, drive aisles, and perimeter landscaping.' ' 2.2 Nature of Construction Activity The proposed redevelopment will start with demolition of the existing structure at 400 W. Magnolia Street. Existing sidewalks, parking, and drive aisles will be removed and replaced. The impetus of ' the project is the construction of a new mixed use building on Lot 1. New utility services will be installed to support the mixed use structure. Construction of these utilities will include a new PVC storm drain, a sanitary sewer manhole, service and grease interceptor, a domestic water service and a fire service. 2.3 Seauence of Maior Activities ' To complete the project, many basic categories of construction activity will take place. As previously mentioned, the first part of the project'will consist of the necessary demolition and removals. Within this phase protection will need to be supplied to the existing storm line that will remain to ensure no sediment is routed through the existing system. Also perimeter protection will need to be established. With the surroundings, type of perimeter protection will vary due to the differing types of ground material. It will be the Contractor's responsibility to implement the ' appropriate measure to suit the installation and type of ground material. This will be followed by utility installation and foundation excavation. Vertical construction of the apartment building will commence after foundation and underground work is complete. New curb/gutter, paving, and sidewalks are expected to begin after the building is dried in and trades move inside. The final stages of site construction will be fine grading of the areas around the buildings, and the installation of landscaping throughout the project. The aforementioned sequencing is an initial best guess, and ' is subject to change at the Contractor's discretion. 2.4 Site Disturbance ' The site disturbance will occur in a portion of Lot 1 and Lot 2 and is approximately 0.64 acres. Site disturbance is essentially limited to the removal and replacement of existing structures and pavements. There is no significant site grading or cuts/fills. ' 2.5 Existing Data In order to complete the associated construction plans, a topographical survey of the site was ' completed. This survey consisted of field measurements made by Northern Engineering Services on June 11, 2012. In addition to the field survey, the Natural Resources Conservation Service (NRCS) Soil Survey was t used to determine existing soil types found on -site. According to the NRCS Soil Survey, the site consists entirely of Fort Collins loam. The Fort Collins loam is classified as Hydrologic Soil Group B. ' Stormwater Management Plan 2 I ■y NORTHERN ENGINEERING ' Canyon Place 2.6 Existing Vegetation The existing site is over 95% covered with hard surfaces (rooftop, paving, etc.) and established landscaping, which allows minimum surface erosion. It is highly recommended that pre - construction photos be taken to clearly document vegetative conditions prior to any disturbance activities. ' 2.7 Potential Pollution Sources As is typical with most construction sites, there are a number of potential pollution sources which could affect water quality. It is not possible for this report to identify all materials that will be used ' or stored on the construction site. It is the sole responsibility of the Contractor to identify and properly handle all materials that are potential pollution sources. The following are some common examples of potential pollution sources: ' Exposed and stored soils Management of contaminated soils • Off -site tracking of soils and sediment Loading and unloading operations ' • Outdoor storage of building materials, fertilizers, chemicals, etc. • Vehicle and equipment maintenance and fueling ' Significant dust or particulate generating processes. • Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc. • On -site waste disposal practices (waste piles, dumpsters, etc.) • Concrete truck/equipment washing Non -industrial waste sources that may be significant, such as worker trash and portable toilets ' • Uncovered trash bins • Other areas or procedures where potential spills can occur • Stockpiling of materials that can be transported to receiving waterway(s) Management of Contaminated Soils: We are not aware of on -site contaminated soils. However, the contractor should conduct a thorough, pre -construction environmental site assessment. If contaminated soils are discovered, the contractor will identify appropriate practices and procedures for the specific contaminants discovered on -site. t Loading and Unloading Operations: During site demolition, material loading and unloading will occur on -site. As site development and building construction progresses, space constraints will limit the number of on -site locations for loading and unloading activities to the building from Canyon Avenue or Magnolia Street. The contractor will be responsible for the proper handling and management of pollution sources during loading and unloading operations. 1 1 Dedicated Asphalt and Concrete Batch Plants: Neither a dedicated asphalt or concrete batch plant will be constructed on -site. 2.8 Non-stormwater discharges The Stormwater Construction Permit only covers discharges composed entirely of stormwater. Emergency firefighting water is the only authorized exception. Concrete Washout water can NOT be discharged to surface waters or to storm sewer systems without separate permit coverage. The discharge of Concrete Washout water to the ground, under specific conditions, may be allowed by the Stormwater Construction Permit when appropriate BMPs are implemented. ' Stormwater Management Plan 1 W INORTHERN ENGINEERING Place The discharge of pumped stormwater, ONLY, from excavations, ponds, depressions, etc. to surface waters, or to a municipal storm sewer system is allowed by the Stormwater Construction Permit, as long as the dewatering activity and associated BMPs are identified in the Stormwater Management Plan (SWMP) and are implemented in accordance with the SWMP. Aside from the exceptions noted above, nonlstormwater discharges must be addressed in a separate permit issued for that discharge. If groundwater is encountered, and dewatering is required, a Construction Dewatering Permit must be acquired from the Colorado Department of Public Health and Environment. A copy of the dewatering permit application and instructions has been included . with Appendix D. ' 2.9 Receiving Waters Stormwater runoff from this project is designed to drain in two major directions. The existing parking lot to the north and the northern half of the courtyard will discharge into Canyon Avenue. ' The runoff discharged into the Canyon Avenue is intercepted by a curb inlet and routed through the City's storm sewer system. The remaining courtyard area will drain south into a proposed trench ' drain. The proposed trench drain is also connected to the City's storm sewer system. This City storm sewer conveys stormwater to the north, through the "Old Town" area before discharging into the stormwater quality facility within the Udall Natural Area, which is located approximately 1.0 miles downstream from the project. Once flows reach the Udall Natural Area, they flow north ' approximately 200 feet to the Poudre River. This drainage pattern follows the historic drainage course. ' 3.0 Stormwater Management Controls 3.1 SWMP Administrator A SWMP Administrator must be designated in conjunction with the Stormwater Permit. This person ' shall be responsible for developing, implementing, maintaining, and revising the SWMP. The SWMP Administrator will also be the contact for all SWMP-related issues and will be the person responsible for the accuracy, completeness, and implementation of the SWMP. The Administrator should be a person with authority to adequately manage and direct day-to-day stormwater quality management activities at the site. ' The SWMP Administrator for this site is: Name: (to be filled -in by permittee) Company: (to be filled -in by permittee) Phone: (to be filled -in by permittee) ' E-mail: (to be filled -in by permittee) 3.2 Best Management Practices (BMP's) for Stormwater Pollution Prevention Beginning from mobilization, and throughout the entire construction of the project, erosion control ' devices shall be installed to ensure minimal pollutant migration. These erosion control devices may be installed in phases, or not at all, depending on actual conditions encountered at the site. It is the responsibility of the Contractor to make the determination as to what practices should be ' employed and when. In the event that a review agency deems BMPs to be insufficient, it shall be the responsibility of the contractor to implement modifications as directed. ' Best Management Practices (BMPs) are loosely defined as a method, activity, maintenance Stormwater Management Plan 4 I ■y NORTHERN ENGINEERING Canyon Place procedure, or other management practice for reducing the amount of pollution entering a water ' body. The term originated from rules and regulations in Section 208 of the Clean Water Act. Details for Structural and Non -Structural BMPs have been included in Appendix B. These details ' should be used for additional information on installation and maintenance of BMPs specified in this report. It is also intended to serve as a resource for additional BMPs that may be appropriate for the site that have not specifically been mentioned in the report. 3.3 Structural Practices for Erosion and Sediment Control Structural BMPs are physical devices that are implemented to prevent erosion from happening or to limit erosion once it occurs. These devices can be temporary or permanent, and installation of ' individual components will vary depending on the stage of construction. A table depicting construction sequence and BMP application/removal has been placed on the ' "Dynamic Site Plan" to help document the implementation of these BMPs. Refer to the Stormwater Management Plan Static Site Plan in the Appendix for the assumed location of all BMPs. Construction Details for Temporary BMPs are located in the Appendix for reference. Again, the final determination for which BMP's will be installed, where they will be located, and when they will be installed shall be made by the Contractor, along with all documentation throughout the construction process. ' Silt Fencing (Phase 1) Silt fencing shall be provided to prevent migration of sediment off -site or into adjacent properties. All silt fencing shall be installed prior to any land disturbing activity (demolition, stockpiling, ' stripping, grading, etc.). Silt fencing is to be installed prior to site excavation or earthwork activities. ' Inspections of the silt fence should identify tears or holes in the material, and should check for slumping fence or undercut areas that allow flows to bypass the fencing. Damaged sections of fencing should be repaired or replaced to ensure proper functioning. Sediment accumulated behind ' the silt fence should be removed to maintain BMP effectiveness, typically before it reaches a depth of 6 inches. At a minimum, it is suggested that silt fencing shall be located along the northern, eastern and ' southern limits of disturbance. Silt fencing can installed in conjunction with/adjacent to construction or security fencing. Sediment Control Logs may also be substituted in lieu of silt fencing, as appropriate. See below for a description of Sediment Control Logs. Sediment Control Log — aka "Straw Wattles" (Phase 1) A Sediment Control Log is a linear roll made of natural materials, such as straw, coconut fiber, or other fibrous material trenched into the ground and held with a wooden stake. Sediment Control ' Logs can be used in many instances. Examples include perimeter control for stockpiles, as part of inlet protection designs, as check dams in small drainage ways, on disturbed slopes to shorten flow ' lengths, or in lieu of silt fencing (where appropriate). Sediment Control Logs should be inspected for excess sediment accumulation. Sediment should be removed prior to reaching half the height of the log. At a minimum, Sediment Control Logs should be used around soil stockpiles (including landscape material) and at all stormwater discharge locations other than inlets. ' Stormwater Management Plan 5 C ■� NORTHERN ENGINEERING Canyon Place Vehicle Tracking Control Pads (Phase 1) Vehicle tracking control pads shall be provided to minimize tracking of mud and sediment onto paved surfaces and neighboring roadways. All vehicle tracking control pads shall be installed prior to any land disturbing activity (demolition — as necessary, stockpiling, stripping, grading, etc.). Location of vehicle tracking control pads will be located at any and all existing and future vehicle accesses being used during any of the construction phases. These locations will primarily be dictated by gates or openings in the temporary construction fencing that is expected to be installed. Vehicle tracking control pads are to be installed prior to demolition (as appropriate), site excavation or earthwork activities. Vehicle tracking pads should be inspected for degradation and aggregate material should be replaced as needed. If the area becomes clogged with water, excess sediment should be removed. Aggregate material should remain rough, and at no point should aggregate be allowed to compact in a manner that causes the tracking pad to stop working as intended. Suggested locations for a vehicle tracking pad is at the proposed access to the site from Canyon Avenue. Inlet Protection (Phase I & II) Inlet protection shall be provided for existing inlets to prevent sediment transport from adjacent earthwork disturbance. Installation of these filters shall occur before adjacent earth disturbing activities (Phase I implementation). Wattle type filters are to be implemented for new and existing inlets where asphalt does not exist. For these inlets, if pavement is constructed adjacent to the structure or if the area adjacent to the inlet is changed such that the wattle type filter is no longer effective, it shall be the responsibility of the Contractor to ensure that an appropriate method is used instead. For example, the wattle filter could be reused, or a gravel -block inlet filter may be installed. It will be left to the discretion of the Contractor as to whether replacement of any inlet filter is necessary. Inlet protection should be inspected regularly for tears that can result in sediment entering an inlet. ' Inlet protection should also be inspected for sediment accumulation upstream of the inlet, and sediment should be removed when the less than half of the capacity is available, or per manufacturer specifications. ' The existing inlets along Canyon Avenue, Magnolia Street and Meldrum Street will need protection. The Contractor shall also provide inlet protection for all proposed trench drains as they are installed (Phase II implementation). Concrete Washout Area (Phase II) A concrete washout should be provided on the site. The washout can be lined or unlined excavated pits in the ground, commercially manufactured prefabricated containers, or aboveground holding areas. The concrete washout must be located a minimum of 400 feet from any natural drainage way or body of water, and at least 1000 feet from any wells or drinking water sources. Washout areas should not be located in an.area where shallow groundwater may be present. Contractor shall clearly show the desired location and access to the Concrete Washout Area on the Stormwater Management Plan - Dynamic Site Plan. Contractor shall place a Vehicle Tracking Pad if the selected location for the Concrete Washout Area is detached from pavement. Clear signage identifying the concrete washout should also be provided. Stormwater Management Plan 6 I ■� NORTHERN ENGINEERING Canyon Place The Concrete Washout Area should be inspected regularly. Particular attention should be paid to signage to ensure that the area is clearly marked. Confirmation that the washout is being used should also be noted to ensure that other undesignated areas of the site are not being used incorrectly as a concrete washout. An appropriate location for the concrete washout area is located to the northwest corner of the site. This location is a suggestion only, and can be relocated at the discretion of the Contractor. Permanent/Established Vegetation (Phase IV) Permanent or established vegetation and landscaping is considered a permanent form of sediment and erosion control for common open spaces, steep slopes and areas not exposed to prolonged scour velocities, or acute incipient motion bed shear stresses that will create soil erosion, rill formation and subsequent sediment transport. Areas where the previous conditions apply will contain sufficient permanent BMPs, such as riprap or cobble mulch. Permanent vegetation shall conform to the approved Landscape Plan prepared by Land Works. Permanent/Established vegetation and hardscape defines Phase IV of development. 3.4 Non -Structural Practices for Erosion and Sediment Control Non -Structural BMPs are practices or activities that are implemented to prevent erosion from happening or to limit erosion once it occurs. These BMPs can be a practice resulting in physical change to the site, such as mulching or slope stabilization. They can also result in behavioral changes on the site, such as changes to construction phasing to minimize exposure to weather elements, or increased employee awareness gained through training. ' Protection of Existing Vegetation (Phases I -IV) Protection of existing vegetation on a construction site can be accomplished through installation of a construction fence around the area requiring protection. In cases where up -gradient areas are ' disturbed, it may also be necessary to install perimeter controls to minimize sediment loading to sensitive areas such as wetlands. ' Trees that are to remain after construction is complete must be protected., Most tree roots grow within the top 12"-18" of soil, and soil compaction is a significant threat to tree health. As such, particular care should be taken to avoid activities within the drip -line of the tree. Direct equipment damage should also be prevented. The most effective way to ensure the health of trees is to ' establish a protection zone at the drip -line of the tree to prevent unintended activity in the area directly surrounding the tree. ' Fencing should be inspected and repaired when needed. If damage occurs to a tree, an arborist should be consulted on how to care for the tree. If a tree is damage beyond repair, the City Forester should be consulted on remediation measures. ' At a minimum, protection to all trees identified for retention on the plans by Land Works. Stockpile Management (Phases 1-III) ' Stockpile management should be utilized to minimize erosion and sediment transport from soil stockpiles. In general, soil stockpiles should be located a minimum of 100 feet from any drainage way and 50 feet from any storm sewer inlets. Where practical, choose a stockpile location that will remain undisturbed for the longest period of time as the phases of construction progress. Sediment ' control BMPs should be placed around the perimeter of the stockpile, and a designated access point on the upstream side of the stockpile should be identified. BMPs such as surface roughening, temporary seeding, mulching, erosion control blankets, or soil binders should be used to stabilize ' the stockpile surface. Stormwater Management Plan 7 I ■� NORTHERN ' ENGINEERING Canyon Place As a part of stockpile management, regular inspections of the perimeter controls should be ' completed. If BMPs have been utilized to stabilize the surface of the stockpile, they should be inspected and repaired as needed. ' While significant soil stockpiles are not expected with this project, it is possible that foundation excavation or the delivery landscaping material may generate temporary stockpiles. The location of any such stockpiles shall be the responsibility of the SWMP Administrator. ' Mulchine (Phase 1-III) Mulching helps reduce erosion by protecting bare soil from rainfall impact, increasing infiltration, and reducing runoff. Although often applied in conjunction with temporary or permanent seeding, it ' can also be used for temporary stabilization of areas that cannot be reseeded due to seasonal constraints. The most common type of mulch used is hay or grass that is crimped into the soil to keep it secure. However, crimping may not be practical on slopes steeper than three to one (3H:1V). The Contractor shall mulch all planted areas within twenty-four (24) hours after planting. Only weed -free and seed -free straw mulch may be used. Straw mulch should be applied at two (2) tons per acre, and shall be adequately secured by crimping, tackifier, netting or blankets. Hydraulic mulching may also be used on steep slopes or where access is limited. In the case that hydraulic ' mulching is utilized, the Contractor shall use wood cellulose fibers mixed with water at two thousands to two thousand five hundred (2,000-2,500) pounds per acre and organic tackifier at one hundred to four hundred (100-400) pounds per acre. The Contractor is responsible in applying wood chip mulch to all planted trees and shrubs as shown ' on the Landscape Plan prepared by Landworks Design. Wind Erosion/Dust Control (Phase I -IV) t Wind Erosion and Dust Control BMP's help to keep soil particles from entering the air as a result of land disturbing construction activities. Examples include use of a water truck or irrigation/sprinkler system to wet the top layer of disturbed soil, seeding and mulching, soil binders, or wind fences. tIf a water truck or irrigation/sprinkler system is utilized, monitoring to ensure that sufficient water is applied is crucial to ensuring soil particles don't become airborne. Equally important is monitoring ' for overwatering, as too much water can lead to increased erosion. Street Sweeping (Phases I -IV) Street sweeping should be used to remove sediment that has been tracked onto adjacent roadways. ' Roadways should be inspected at least once a day, and sediment should be removed as needed. A check of the area inlet protection should be completed after sweeping to ensure nothing was displaced during sweeping operations. Street sweeping can reduce the sediment washed into the ' existing storm drain system. Street sweeping may be necessary on the existing hardscape areas which receive runoff from the disturbed areas. Saw Cutting Pollution Prevention (Phase 1) ' The following protocol is recommended to prevent dust and slurry from asphalt and concrete saw cutting activities from migrating into the existing storm drain system. ' • Slurry and cuttings shall be vacuumed during cutting and surfacing operations • Slurry and cuttings shall not remain on permanent concrete or asphalt pavement overnight ' • Slurry and cuttings shall not drain to any natural or constructed drainage conveyance 1 Stormwater Management Plan 8 I ■y NORTHERN ENGINEERING Canyon Place • Collected slurry and cuttings shall be disposed of in a manner that does not violate groundwater or surface water standards Good Housekeeping Practices (All phases) I Good housekeeping practices that will prevent pollution associated with solid, liquid, and hazardous construction -related materials and wastes should be implemented throughout the project. ' Examples of good housekeeping include providing an appropriate location for waste management containers, establishing proper building material staging areas, designating paint and concrete washout areas, establishing proper equipment/vehicle fueling and maintenance practices. Development of a spill prevention and response plan is another example of Good Housekeeping practices that should be used on the project. The following items are detailed examples of some of the good housekeeping practices that should be utilized throughout the project. It should be noted ' that a complete list of practices and detailed discussion regarding good housekeeping has been included with Appendix B, sheets GH-1 — GH-6. Street Sweeping and Vacuuming — Street sweeping and vacuuming should be used to remove sediment that has been tracked onto adjacent roadways. Roadways should be inspected at least once a day, and sediment should be removed as needed. A check of inlet protection should be ' completed after sweeping to ensure nothing was displaced during sweeping operations. Waste Management — Designate trash and bulk waste collection areas on -site. When possible, materials should be recycled. Hazardous material waste should be segregated from other solid waste. Waste collection areas should be located away from streets, gutters, watercourses, and ' storm drains. Dumpsters should be located near site entrances to minimize traffic on disturbed soils, and they should be placed on a level soil surface. Establish Proper Building Material Handling and Staging areas — Clearly designate site areas for ' staging and storage of building materials. Provide appropriate BMPs to ensure that spills or leaks are contained. ' Establish Proper Equipment/Vehicle Fueling and Maintenance Practices — If needed, create a clearly designated on -site fueling and maintenance area that is clean and dry. Provide appropriate BMPs to ensure that spills or leaks are contained. 3.5 Phased BMP Installation It is important to recognize the four (4) major Development Phases as defined by the State of Colorado's Stormwater Discharge Permit (SDP). These four development phases (referred to as Sequencing by the City of Fort Collins) have been distinguished to aid in the appropriate timing of installation/implementation of BMPs at different stages of the construction process. These phases are described as follows: Phase I — Grading Stage; BMPs for initial installation of perimeter controls Phase I/ — Infrastructure Stage; BMPs for utility, paving and curb installation ' Phase 111 — Vertical Construction Stage; BMPs for individual building construction. Phase IV — Permanent BMPs and final site stabilization. ' Stormwater Management Plan 9 1 1 1 i 1 ■y NORTHERN ENGINEERING Canyon Place The following is a rough estimate of the anticipated construction sequence for site improvements. The schedule outlined below is subject to change as the project progresses and as determined by the General Contractor. Table 1 — Preliminary Permit and Construction Schedule BEGINNING BMP-PHASE OF TASK DATE ENDING DATE DEVELOPMENT' - Dewlopment Construction Permit March 2013 March 2013 1 Issued by City of Fort Collins Ovedot Grading (Demolition) March 2013 March 2013 I Utility Installation March 2013 Arpil 2013 II Building Construction Arpil 2013 November 2013 III Final Stabilization October 2013 November 2013 N Included in the back map pockets are five Site Plans: a "Static" Site Plan and four "Dynamic" Site Plans. The "Static" plan serves to display the overall management plan all at once. However, proper implementation of BMPs does not occur at once, and certain BMPs may move location in the construction process; therefore, the "Dynamic" Site Plans are intended for the Contractor to write in the BMP symbols to document the location and time the BMPs are installed and maintained throughout the entire construction process. 3.6 Material Handling and Spill Prevention Potential pollution sources, as discussed in earlier sections, are to be to be identified by the Contractor. Spill prevention procedures are to be determined and put in place prior to construction by the Contractor. A spill and flooding response procedure must also be determined and put in place prior to construction by the Contractor. Additionally, steps should be taken to reduce the potential for leaks and spills to come in contact with stormwater runoff, such as storing and handling toxic materials in covered areas or by storing chemicals within berms or other secondary containment devices. A notification procedure must be put in place by the Contractor, by which workers would first notify the site construction superintendent, who would then notify the SWMP Administrator. Depending on the severity of the spill, the site construction superintendent and SWMP Administrator would possibly notify the Colorado Department of Public Health and Environment - Water Quality Control Division, downstream water users, or other appropriate agencies. The release of any chemical, oil, petroleum product, sewage, etc., which enter waters of the State of Colorado (which include surface water, ground water, and dry gullies or storm sewers leading to surface water) must be reported immediately to the Division's emergency spill reporting line at (877) 518-5608. All spills that will require cleanup, even if the spill is minor and does not need to be reported to the state, should still be reported to the City of Fort Collins Utilities office at 970-221-6700. While not expected with this project, it will be the responsibility of the Contractor to designate a fueling area and take the necessary precautions to ensure that no stormwater pollution occurs in the event that a fueling area is needed. Fueling areas shall be located a minimum 100 feet from all drainage courses. A 12-inch high compacted earthen ridge capable of retaining potential spills shall enclose fueling areas. Other secondary containment devices can be used instead of the earthen ridge. The area shall be covered with a non -porous lining to prevent soil contamination. Printed instructions for cleanup procedures shall be posted in the fueling area and appropriate fuel absorbents shall be available along with containers for used absorbents within the fueling area. Stormwater Management Plan 10 ■� NORTHERN ENGINEERING Canyon Place 3.7 Dedicated Concrete or Asphalt Batch Plant There are not any dedicated concrete or asphalt batch plants anticipated with this project. In the event that a plant is needed, the Contractor should be aware that additional permitting will be required. In particular, an Air Pollutant Emission Notice (APEN) will need to be obtained from the CDPHE. 3.8 Vehicle Tracking Control In addition to the vehicle tracking pads discussed previously, additional measures can be taken to minimize and control sediment discharges from the site due to vehicle tracking. These measures can include fencing around the site to control access points. Regular street sweeping can also be used to minimize the transmission of sediment from the site due to vehicles leaving the site. The use of gravel parking areas and wash racks can also be implemented to ensure minimal vehicle tracking from the site. 3.9 Waste Management and Disposal ' It will be the responsibility of the Contractor to designate a concrete truck chute washout area and to clearly identify that area. Detailed information about the design and maintenance of the Concrete Washout can be found under the Structural Practices section of this report. At no time should untreated wash water be allowed to discharge from the site or to enter a storm drain system or stream. Upon completion of construction activities the concrete washout material shall be removed and properly disposed of prior to the area being restored. ' Any waste material that currently exists on the site or that is generated by construction will be disposed of in such a manner as to not cause pollutants in stormwater discharges. If waste is to be stored on -site, it shall be in an area located a minimum of 100 feet from all drainage courses. Whenever waste is not stored in a non -porous container, it shall be in an area enclosed by a 12- inch high compacted earthen ridge or some other approved secondary containment device. The area shall be covered with a non -porous lining to prevent soil contamination. Whenever precipitation is predicted, the waste shall be covered with a non -porous cover, anchored on all sides to prevent its ' removal by wind, in order to prevent precipitation from leaching out potential pollutants from the waste. On -site waste disposal practices, such as dumpsters, should be covered or otherwise ' contained as to prevent dispersion of waste materials from wind. It shall also be the responsibility of the Contractor to maintain a clean jobsite as to prevent dispersion of waste material and potential pollutants into adjacent properties or waterways. The location of, and protective measures for, temporary restroom facilities shall be the responsibility ' of the SWMP Administrator. ' 3.10 Groundwater and Stormwater Dewatering The BMPs selected for construction dewatering vary depending on the site -specific features, such as soils, topography, discharge quantities, and discharge location. Typically, dewatering involves pumping water from an inundated area to a BMP, prior to the water being released downstream ' into a receiving waterway, sediment basin, or well -vegetated area. Acceptable BMPs included discharging water into a sediment trap or basin, using a dewatering filter bag, or using a series of sediment logs. A settlement tank or an active treatment system can also be utilized. Another commonly used method to handle the pumped water is the "sprinkler method," which involves applying the water to vegetated areas through a perforated discharge hose. Dispersal from a water truck for dust control can also be used to disperse the pumped water. ' Stormwater Management Plan 11 I 1 ■� (NORTHERN ENGINEERING Canyon Place 1 4.0 Final Stabilization and Long -Term Stormwater Management 4.1 Final Stabilization ' All disturbed areas will be seeded, crimped and mulched. As defined by the Colorado Department of Public Health and Environment in the General Permit Application for Stormwater Discharges, "Final stabilization is reached when all soil disturbing activities at the site have been completed, and uniform vegetative cover has been established with a density of at least 70 percent of pre - 1 disturbance levels or equivalent permanent, physical erosion reduction methods have been employed." 1 4.2 Long -Term Stormwater Management The method of long-term stormwater management will take place at the Udall Natural Area water quality facility. All disturbed areas will receive permanent paving or will be vegetated per the 1 Landscape Plan. 5.0 Inspection, Maintenance and Record Keeping 1 5.1 BMP Inspection All temporary erosion control facilities shall be inspected at a minimum of once every two (2) weeks 1 and after each significant storm event or snowmelt. Repairs or reconstruction of BMPs, as necessary, shall occur as soon as possible in order to ensure the continued performance of their intended function. It is the responsibility of the SWMP Administrator to conduct bi-weekly inspections, maintain BMPs if needed, to keep records of site conditions and inspections, and to ' update the SWMP as necessary. The construction site perimeter, disturbed areas, all applicable/installed erosion and sediment control measures, and areas used for material storage that are exposed to precipitation shall be inspected for evidence of, or the potential for, pollutants entering the drainage system. Erosion and sediment control measures identified in the SWMP shall be observed to ensure that they are operating correctly. Particular attention should be paid to areas that have a significant potential for 1 stormwater pollution, such as demolition areas, concrete washout locations, and vehicle entries to the site. The inspection must be documented to ensure compliance with the permit requirements. 1 5.2 BMP Maintenance Any BMP's not operating in accordance with the SWMP must be addressed as soon as possible, immediately in most cases, to prevent the discharge of pollutants. If modifications are necessary, ' such modifications shall be documented so that the SWMP accurately reflects on -site conditions. The SWMP needs to accurately represent field conditions at all times. 1 Uncontrolled releases of mud, muddy water, or measurable amounts of sediment found off -site will be recorded with a brief explanation of the measures taken to clean-up the sediment that has left the site, as well as the measures taken to prevent future releases. This record shall be made available to the appropriate public agencies (Colorado Department of Public Health and 1 Environment, Water Quality Control Division; Environmental Protection Agency; City of Fort Collins; etc.) upon request. Preventative maintenance of all temporary and permanent erosion control BMPs shall be provided in order to ensure the continued performance of their intended function. Temporary erosion control measures are to be removed after the site has been sufficiently stabilized as determined by the City of Fort Collins. Maintenance activities and actions to correct problems shall be noted and recorded ' Stormwater Management Plan 12 I ■� NORTHERN ENGINEERING Canyon Place ' during inspections. Inspection and maintenance procedures specific to each BMP identified with this SWMP are discussed in Section 3. Details have also been included with Appendix B. I 5.3 Record Keeoine Documentation of site inspections must be maintained. The following items are to be recorded and kept with the SWMP: • Date of Inspection ' Name(s) and title(s) of personnel making the inspection • Location(s) of sediment discharges or other pollutants from the site • Location(s) of BMP's that need to be maintained • Location(s) of BMP's that failed to operate as designed or proved inadequate Locations(s) where additional BMP's are needed that were not in place at the time of inspection ' Deviations from the minimum inspection schedule • Descriptions of corrective action taken to remedy deficiencies that have been identified ' The report shall contain a signed statement indicating the site is in compliance with the permit to the best of the signer's knowledge and belief after corrective actions have been taken. Provided within Appendix E of this SWMP is an Example Inspection Log to aid in the record keeping of BMP inspections and maintenance. Photographs, field notebooks, drawings and maps should be ' included by the SWMP Administrator when appropriate. In addition to the Inspection Log, records should be kept documenting: ' BMP maintenance and operation • Stormwater contamination • Contacts with suppliers Notes on the need for and performance of preventive maintenance and other repairs ' • Implementation of specific items in the SWMP • Training events (given or attended) Events involving materials handling and storage ' • Contacts with regulatory agencies and personnel • Notes of employee activities, contact, notifications, etc. Records of spills, leaks, or overflows that result in the discharge of pollutants must be documentec and maintained. A record of other spills that are responded to, even if they do not result in a discharge of pollutants, should be made. Information that should be recorded for all occurrences includes the time and date, weather conditions, reasons for the spill, etc. Some spills may need to be reported to authorities immediately. Specifically, a release of any chemical, oil,,petroleum product, sewage, etc., which may enter waters of the State of Colorado (which include surface water, ground water and dry gullies or storm sewers leading to surface water) must be reported to the CDPHE. Additionally, the "Dynamic Site Plan" is intended to be a "living" document where the SWMP ' Administrator can hand write the location of BMPs as they are installed to appropriately reflect the current site conditions. Also on the "Dynamic Site Plan" is a "Table of Construction Sequence and BMP Application/Removal" that the SWMP Administrator can use to document when BMPs were installed or removed in conjunction with construction activities. These items have been included as an aid to the SWMP Administrator, and other methods of record keeping are at his or her discretion. This Stormwater Management Plan (both the text and map) is not a static document. It ' is a dynamic device intended to be kept current and logged as construction takes place. Stormwater Management Plan 13 ■y NORTHERN ENGINEERING Canyon Place ' It shall be the responsibility of the SWMP Administrator and/or the permit holder (or applicant thereof) to ensure the plan is properly maintained and followed. Diligent administration is critical, including processing the Notice to Proceed and noting on the Stormwater Management Plan the dates that various construction activities occur and respective BMPs are installed and/or removed. I [1 1 1 I 1 I ' Stormwater Management Plan 14 ■� NORTHERN ENGINEERING Canyon Place 6.0 Additional SWMP and BMP Resources Urban Drainage and Flood Control District Urban Storm Drainage Criteria Manual - Volume 3 "Best Management Practices" Colorado Department of Transportation Erosion Control and Stormwater Quality Guide BMP Field Academy EPA Menu of BMP's Construction Site Storm Water Runoff Control International Stormwater Best Management (BMP) Database Rocky Mountain Education Center Rocky Mountain Education Center Red Rocks Community College, Lakewood Keeo It Clean Partnership Boulder Stormwater Management Plan 15 ■y NORTHERN ENGINEERING Canyon Place References 1. Drainage Letter Report for Canyon Place, Northern Engineering Services, September 19, 2012 (NE Project No. 838-002) 2. Soil Resource Report for Larimer County Area Colorado, Natural Resources Conservation Service, United States Department of Agriculture. 3. Urban Storm Drainage Criteria Manual, Volumes 1-3, Urban Drainage and Flood Control District, Water Resources Publications, LLC., Denver, Colorado, Updated November 2010. Stormwater Management Plan 16 NnrthernEnaineerina.cam // 970.221.41S9 f EXISTING BANK BUILDING TO REMAIN / \ 10 S. MELDRUM STREE T) </xLIP / APPROMYAR LIMIM I. rcED OF DISTURBANCE 0— DE a O / — — W APPROAMATE UNITS OF wsTlmsuxE / •/ i \r_—/ PERIMETER PROR W Cn (SUE NOTE B) 8F TUTU SF EXISTING OFFICE I �— / BUILDING TO REMAN / (310 CANYON AVENUE) APPROXIMATELIMITS I OF DISTURBANCE _ .64 AC LIP/ PROMSED BUILDING if I Ip 4. • I / • e Lm�m • ' W � P W W.,r1AG`%fGUA$T((EET PEAYEIFR PR 2C71041 (IW RIGHT-O - AY) APPROXIMATE LIMITS (SEE NO B) OF wsTURBANCE • • • • is I• oaaaaaa000©o ------------ ------------ ------------ 04—J ` ® NORTH aD D m a wF.N IN MET ) I INPIN RD h. LEGEND: FAW64D PROPERTY ONE 5020 --- EXI CWTWN zD — PROPOSED ONTOUR — PROPOSED MWOUT ONE PROROGUE VVUKG OURB AND WMA (TYPICAL) ENsnw; CORe AND WTTER 11000I __ RwOwAY O MY RUE O INLET PROTECTION gQi{{$YAp a` jH ®, OW wA,rla {Ead B E a H MArTIE Ypupr 1RAP n ® wHICLE TRAaIxG PAD Z K.7 B �Z =W W �Z 3 NOTES: ) 1. THE SIM TYPE AND LOCATOR OF ALL KNOWN UNDEROKAND �l Z JI µE APPROYMATE WHEN SHOW W TREY DRAMNGs IT L W SNAIL BE ME RESPONSIBIUTY GE ME CONTRACTOR r0 'WARY ME EMS ENCE OF ALL UNDERGROUND UPEITES IN ME AREA IF ME WI BEFLOM ONAMENONG NEW CONSTRUCTION. ME CONTRACTOR e WA LL BE RESPONSIBLE FOR LC IMG ALL UNDERGROUND UnunEs o SHALL IC RESPONSHI FOR ALL UNKNOWN UNDERGROUND unes z. MOROx CONTROL PRACTCES, IBM PRolEcnfN. AND RE.EGEunpv y EMws SMALL FOLOr On REWUMRs }8Yy J. IT SHOULD w NOiw MAY ANr ENOSMORCONTRACTOR. CWTRO D AN IOR S ONLY As O W BEST MA AG ME cP1}RAROt srAGNG EXPECT ADDING Ci N DIFFERENT PUCTCEM MORE 5 EXPECTED. W BEUN CESSARYP WRING FROM MORE ORIWE TO B� ADDITIONALDEPICTED NECESSARY WPoRE REWIRED ILAN CHANCING MAY AiE CONDITIONS OR AS REWIRED BY LOCAL AUMOM1TES. • THIS EROSBI COMET PLAN IS WMENATC IN NATURE AS SUM „APPEAL SWR0.5 MAY NOT BE TO SCALE. NCR ARE THEY NECESSARILY SHOWN EN EXACT La CATION, F 5. ME C NTRACTOR SMALL BE RESPONSIBLE FOR ALL PERMITYNG (OW,,STATE w5pµ4E PERMT. ETCw.) AND CWPIIµO: AM PoKR INGIr HALL BE ME REIDONIOUTY W ME CONTRACrCONTRACTOR�� PPP (PI PERMIT HEADER) M ENRE ER�ON MEASURES AM CO TMI. MsURES A MO'RRLY MAINTAINED AND FOLLOWED, 6 CONTRACTOR SHALL IMPLEMENT ME APPROPRIATE OBERON CONTROL L m 5 MEASURES ACCORDING THE ME CONSTRUCTION YWpCNG AND L LEVEL OF are STASIOZAToN. ,W`W�{{8 A A T CpNTRACRYt SHALL IMPLEMENT APPROPRIATE INIET PROMC104 FOR 12 ALL STEAM DRAWS UNTIL SIM Is FULLY STABILIZED. INFT A. FROTECnW SHAUL BE ADAPTED, As NECESSARY, TO ME SURROUNDING FOR SAFE SO_ SAND AND AGS CR DRAW STAKE-DRIVEN s i0a`Ex PAVEMENT ETC.I 6 OCIPURACTUR SHALL IMPLEMENT APPROPRIATE PERIMETER PROPECMN FOR AREAS DIRECTING DRAINAGE OP9R. PERIMETER FROMICTON SHALL BE ADAPTED. AS MIS N. TD ME SURROUNDING SURFACE TYPE µDI WNDITON U.e. STAKE -DRIVEN SEDIMENT CONTROL LOGS OR SILT R NDE FOR SAM SEAL SAND BASE OR CRAKL SI FEN 11 1 EMINENT, ETC.) J •�./�. 9. CONTRACTOR 15 RESPONSIBLE FOR STABIU➢NG ALL APE$ L y/ PARTOJI MOST STEERR MAN 61. OBMP MULCING MYLRD MULCHING. ER09GN MATS, TEMPORARY IRAGATON, AND ADDITONAL VAEAGE Ar TVEEN wLNRR AND STARLBE ET THEO OPE ro ESTABLISH J /� 10.. sR LANDSCAPE PLANS FOR ADOnOI INFORMATION ON ALµnxc LL AMNRETH XZAYCN MsWCs AND OTHER PERMANENT r IW J R OZ F- a Zd O z UH U O� U_ O� Lu U• Sheet CBII InNA ru dig. CU.�2 ��� Of 3 Sheets / sP / EXISTING BANK /// Opl` *^/ - F � BUILDING TO ROMAN / / A� (319 S. MELDRUM STREET) 4f OF DISTURBANCE // OF / // OF NSGj A1E UNITS �0 / S / mom k o it (YE NOTE e) TY EXIS / TOPP ICE 1 /WILDINGO REMAIN (318 1e CANYON AVENUE) 91 APPROXIMATE L ITS -' i I i OF DISTURBANCE =0.64 AC IP I 1 p 1 PROPOSED WILDING r / 1 Z W I I W. MAGNOLIA STREET (lW RIGHT-OF-WAY) ARRONLATE AIDS OF ORDINANCE I I I I I I I — I I I I I __ —, I I I 1 1 I I I I I I I _ I I TABLE OF CONSTRUC ION SEQUENCE AND BMP APPL ATION NORTH 311 0 20 40 60 FM N FEET ) 1 Lp _ 20 R LEGEND: �__� IIOW ENE PROPOSED PROPERTY ONE 502D - IMSnNG CONTOUR — 20 — PROPOSED CONTOUR PROPOSED SANWT ME PROPOSED VERnCK TURN AND w FUNT (TYPICAL) -- E4STNO CURB AND GOTTEN FL DG AN ______ FT.ROWAY Y—O SILT FORCE OP INEF PROTECTION m® O WATTLE OWATTLE iECYFIT TOM ® ® ARGUE TRACKING PAD NOTES 1. TIE SRO, TYPE AND LOCATION OF ALL GROAN UNDERGROUND TVTIES µE A^FAOMMATE WHEN SHOWN ON ESE DRAWINGS IT SMALL BE ME RESPONSIBILITY OF ME CONTRACTOR TO 'VERIFY ME DISMNCE OF ALL UNDERGROUND U7URES IN ME M EA OF ME WCAM BEFORE COMMENCING NEW CORSUCTON, E CONTRACTOR SHAUL BE REPMROLE FOR LOCATING ALL UNDERGROUND UPVTIES AND SHNIL BE RESPw9&f FOR ALL UNKNOWN UNDERGROUND GIESE& 3 EROSION CONTROL RAI STE PROTECTION, AND REWCETAnpR METHODS SHAG FOLLOW CITY REGULATIONS 1 IT SHOULD BE NOTED THAT ANY EROSION CONTROL MAN SERVES ONLY AS A GUOOME TO ME CONTRACTM STAONG AND/OR PHASING P BEST MANAGEMENT PRACTICES (BMPe) IS EMFECTED. ADDITIONAL µD/W DIFFERENT BMPe FROM M03E DRIONAllY APICCTEO MAY BE NECESSARY DURING COAST UCTON WE M CHARGING SITE CONDITIONS OR AS REWIRED BY LOCAL AUMORTES. 1 THIS EROSION CONMO PLAN IS BONSA TC IN NATURE. IS SUCH, GRAPHICAL MOMS MAY NOT BE TO SCALE. NOR ARE THEY ECESSARILY SHOWN IN THEN EXACT LOCATION. S. ME CONTRACTOR 4 ALL BE RESPONSI FOR ALL PRINTING (STY, STAFF DISCHARGE PERMIT, ETC) AND COMMANCE WM WASHING AUMLOMTES. IT SMALL. RE ME RESPORNYJTY OF ME CONTRACTOR (OR PERMII HOMAINR) TOINNSUREFOLLEROSION CONTROL MEASURES µE PRO6. CONTRAACTOR SHAUL IMPLEMENT ME APPROPRIATE GROWN ROL MEARES ACCORDING ME ME CONSTRUCTION SEWENGNG AND UAL OF S'TE STAGAUZATON. CONTRACTOR SMALL IMPLEMENT APPROPRIATE RUT ROT:CTON FOR ALL STORM DRAMS UNTIL ME IS FULLY STMIUZED SUIT PROTECTION SHALL BE ADAPTED. AS NECESSARY. TO ME SURRMAING SURFACE TYPE AND WNDITON (10, STµE-OM`VEN WATTLES FORT GAGE SO4 SAND SAGS OR GRAVEL SDWS FOR PAVEMENT. ETC.) S. CONTRACTOR WALL IMPLEMENT APPROPRIATE PRIMETPROTECTION AREAS ORECTNG DRAINAGE OTSITE. PERIMETER PROMCDON SMALL W ADAPTED, AS NECESSARY. TO ME "RANGING SURFACE TYPE AND CONOTON (I.e., STµE-DRIKH SEDIMENT CONTR0. LOW ON SILT FENCE FOR BARE SM. SAND BAGS OR GRAND. BOOKS FOR PAAEMENT. ETC) B. CONTRACTOR IS REPONSGE FOR STADIUMS ALL APES. PARTWLL A Y THI SMR F EPMAN &I. WIMP MUUHIHHYDROVMPING. RO ION MATS, TEMPORARY WPoGATON, AND AOOTONN WATTLES W SIT PLACING MAY SE NECESSARY TO ESTAGISH K(ETATA CODER AND STIBYUIE ME SLOPE, ID SEE URDSCAPE MASS FOR ANSI MPS4MATION ON RINnxG, LEXfl£unON, HANDSOME AND OMEN PERMANENT 97 SYMBOLISM MEMOS I ORAW 10 Vw:wlaYsbBIOW. CaI IIMDIB yGD ey. pSM1eeT C6 60 9v OP MMOLWIE RISER 6 pSRRB.WO� EXISTINGOFFICE BUILDING TO REMNN (318 CANYON AVENUE) rnrr mr1nMRH II W. MAGNIXLI BTREET (100' RIGHT-OF-WAY) \\\\`i �J BUILDINGNTO RREEIMAIN \ l (319 S. MELDRUM STREET) jjI N / APPROXIMATE OF DISTURBANCE PROPOSEDBUILDING AWROYTAM ARTS OF DrsIVBRWCT •LE OF CONSTRUCTION SEQUENCE AND BMP APPLICATIONIREMMIM — aaaaaa0000mo ® NORTH IB 0 SO w INDENT (IN EFET ) 1 b Nt . 20 LEGEND: — ROW FINE - - PROPOSED PROXIMITY UK — FASTING CMRVR 5020 30 — PROPOSED CONTENDS PROPOSED SAKV i UWE PROPOSO VERTICAL OVER µ0 BITTER (TEFICAL) FASTING WRB AND BETTER FLO]PAN ...... RgUWAY OSILT FENCE OINLET PROTOCMYR ®o PATTIE OWAIDIF 4I T TRAP © KNILIE TRADING PAD _ !'$�E •�� ZQ3 8 �Z p =W ¢� NOTES: )CD - Z Y 1 un FES TONE FR LOOSEN OE NL N OWN THESE W I Sw ES ARE nRESTCA ATE WHEN STOW ox CTOR WADIFY IT x011 BE B E ADD UNDERGROUND 6 ME CCNTRAEND TO vW THE ME EDSTWORK rvCE BEFORE C MMDNCED NE CONSCR C ME TH EC N PE xqM. ERESF' COMMENCED REIN NIG ALL CONSTRUCTION. AO CONTRACTOR AND T A ME RESSE Sa LOCFOR AU. AL UNOOWN UNDERGROUND Unun[s ENALL RESPBN9BL£ FOR ALL UNKNOWN UNCfA(AWHD LIPES t 3. EROSION COVERED FRACTCE; SITE PROTECTION, µ0 REVEL£TAnON METHODS SHAu FOLLOW DUTY REGULATORS .l. IT BE NOTED MAi AC EROSION CONTROL PUN SERVES YEs ONLY AS A GUIDELINE To THE CONTRACTOR. SENDING AND PHASNG OF BEST XAQywRT PRACR (HOPE) EXPECTED. EPICDOOPERIENT We MEN THOSE O Y DEPICTED MAY BE NECESSARY pSRCONSTRUCTION WE T0 GING SITE CpIg7045 ON n5 KORBY LOCAL AUMgdn ES of TIES CONTROL NATURE. AS A CRn%IIBGLWPLAN MAYHOT BE TO SCAIEWNOR ARE THEY ON• NECESSARILY SHOW IN TKIR EXACT LOCATOR. y S THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (STY. r r Gi STAFF VKHARGE PEMAIT.. ETG AM COMPLIANCE VIEW GOVERNING WENpNTES. T WALL. BE RESPg9BLHTY BE ME CONTRACTOR _ (OR PERMIT READER) TO ENSURE EROSION CONTRLL MEASURES ARE PROPERLY YAINTANEO AND FOLLOWED. 6, CONTRACTOR SMALL IMPLEMENT THE APPROPRIATE EROSION OYTpa 'R MEASURES ACCORDING ME ME C STRUCTON SEQUENCING ANDwi HFhL OF SITE STABILIZATION, BS A J. CONTRACTOR!SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ¢ IaIV tf ALL STORM DRAINS UNTIL 97 IS FULLY STABNSDINLET PROTECTION SHALL BE ADAPTER, AS NECESSARY, TD THE SURROUNDING SURFACE TYPE AND CONDITW (I.e., STnME-DRIVEN WATTLES FOR BARE SOL SAND BAGS OR GRAVEL SOCXS FOR PAVEMENT, ETC.) B CONTRACTOR SOUL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR AREAS DIRECTING DEMNAGE OFF92 PERIMETER PROTECTOR SHALL BE ADAPTED. AS NECESSARY, TO TK SLAROUNDING SURFACE TYPE AND CONDITION O.c. STANE-gd1£N SEDIMENT OxTRO LOGS OR SILT FENCE FOR BABE SSL SAND BA6 OR GRAVE SCENE FOR PAVEMENT. ER.) �J W 9. CONTRACTOR IS RESPONSIBLE FOR STABILISING ALL ACFLC L U) MnWUREY TRD¢ STEEPER THAN H:I. MMP MULCHING. TONY LOUDENING. BEDDOW MATS. TEMPORARY IRRIGATOR SINE AngTM.LL WATTLES O SET FENCING MAY BE NECESSARY TO ESTMUSN VEGETATIVE COVER AND STABIUS THE SLOPE TD. SEA LANDSCAPE PUNS FOR ADDITIONAL INFE MAnON ON PLWnNG. a STARLIUTON WEMXWS E AND OIHw PERMANENT SITE J W N0 R Q LL n ~J a 0 o_ z UH U 0V) U2 W } 0 FSheet C6.03 013 Sheets I I \\ EG OEFIOE I BUILDMINGINGTO REMMN (318 uwvoN AWENDE) II APPROXIMATE L ITS OF DISTURBANCE =0.64 AC Ii,IP PROPOSEDBUILDING ^ � - ------- ---- ----- W. MAf)N" STREET (IWRK9RT-0E-WAh TABLE OF CONSTRUCTION EXISTING BANK BUILDING TO REIMIN (319 S. MELDRUM STREET) Li —APPROXIMATE UNITS / DI DISTURBANCE ENCE AND BMP APPLICATION/REMOVAL • r • • n N u D� ® NORTH A 0 20 •0 60 FW IN NEXT ) I YM . X(I R LEGEND: ROW Ura —__— PROPOSED PROPERTY ONE EXTEND CONTOUR —SOLO — PROPOSED COIRpp — 20 PROPOSED SA'MLT ONE PROPOSED MER CA1 CURB AND (UTTER (TYPICAL) - —' EMEND CURB AND BUTTER ROOOPLAIN LOOOWAY OAT PENCE ® O INLET BRO1EC L OWATTLE OWATTLE SEDIMENT TRAP ® ® 1EIK1E TRAIXIK BAD ZDo t cZ = W � W a NOTES: C) �I 1. ENE SZE. TYPE AND LOCATON M ALL KNOWN UNDERGROUND �J Z UTUIES ARE APPROwuATE MEN 5Y0'MI W THESE DRAMNGS. IT L W SN H E ME RESPONSIBILITY BE ME CONTRACTOR TO VERIFY THE EMSTE CE OF ALL UNDERGROUND UnunES IN ME AREA OF ME MpM, BEFORE COMMENDING NEW CONSTRICTOR. ME CONTRACTOR e_ SHALL BE RESPONSIBLE FOR LWATWO ALL UNDERGROUND UTUTES D SNNL BE RESPONSIBLE FOR ALL UNKNOWN UNDERGROUND ! 1 CROWN MITROU PRAGTRtt TIOI SM MINT AND REVEGETAON METHODS SAL FOLLOW CEM REWLATONS S SHOULD IT BE NOTED MY EROSIONCONTCONTROL.TE CONTROL. PLAN LOR4 ONLY ANDLOR LY AS ns A GUIDELINE WELL MA To MET PRACTICES STATING EXPECT PHASING L SPsr R DIFFERENT MI FROs (THOSE IS EXPECTED. . AoomwAM AND/OR NECESSARYT OUP. THIN ITUCn G+IDUE TO k8 CHANCING STYE CONDITIONS OR DASH FCouPo BY LOCALON OUwTHOWMEs A GRAPHICAL SYMBOLS MAY NOT roFLOCA�i"NOW ME THEYaa. Fi ECESSARILY SHOW IN EN EXACT LOCATOR.5. ME CONTRACTOR SHALL BE PERMITTINGSPONSKE FOR ALL PERMITG (CITY, bSTATE DISCHARGE PERMIT, ETC.) AND COLPUANCE WRAP GOVERNINGAUIHORInES SHAM.BE ME RESP.:NBBIIRY Cf THE COVIRACTGR (BR PERMIT HOER) TO ENSURE ERDSON CONTROL MEASURES ME CRIipLY MAINTAINED AND FOLLOWED. 6, CONTRACTOR SHALL IMPrEMpR ME APPROPRIATE DAMON CWMR B F m S MEASURES ACWRDMG ME ME CONSMUCTON SEWENONG AND 3 3 LELEL E ST STMIUxAnOA US g Pb 5 A6 ). CONTRACTOR SHALL IMPLEMENT APPROPRIATE NLET PROTECTION FOR gtl aLti SOU AllSTORM TRAINS UNTIL SITE IS FULLY STAOUzm. MET PROTEOnaN SHALL BE ADAPTED. AS NECESSARY. TO THE SURROUNDING SURFACE TYPE AND CONDITION (L•., STAKE-DRryFR WATTLES PER BARE SOL. SAND BAGS W GRAVEL SOCKS FOR PAVEMENT. ETC) n CONTRACTOR SHALL IMFUUAENT APPROPRIAT PERMETER PROTECTION PER ARFAs GRECnNG DRAINAGE OFESTE, PERIMETER PROTECTOR WALL SE ADAPTED. AS NECESSARY, TO ME SURROUNDING SURFACE TOPE AND CONDITION (ln, STARE-WIMEN SEDIMENT OMIMCL LOGS OR SLT FENCE FOR BRIE SOIL SAND BAR ON GRAVEL SOCKS FOR PAMEMI ETC.) W B. CONTRACTOR IS RESPONSIBLE £ PSTABILI➢NG ALL SLOG, z 'CS PARTICULARLY THOSE STEEPER MAN 6.1. CRIMP MUI HYDRO Q V' MULCHINGWATTLESOREROSION BUT LENDING WAYBEBEARY IRRIGALLON, AND NECESSARY TO ESTAOISN ONAR J^ Q KGETATVE COP ER AND STMIUZE ME SLOPE LL T HO SEE LANDSCAPE PLANS FOR AMMONAL INFORMATION ON Rµnxc 1/\ R ENEEKEunW' MEINDWS E AND OTHER PERMANENT SITE J LL z EL 1Q z O w U OU) U)U w< wz fI1L VlYIYIgTFHGTOi xT[v ..P 0 COLORADO Mcno WRRE•bRow, snoR:t fell^'E.EWo,, C6.04 r�m��xxxu Of 3 Sheets �i All `^ S 1P TU UNITS OF DISTURBANCE I OIS NPBANM� C` / / / \ DUSTING OFRCE BUILDING TO REMIVN (818 CANYON AVENUE) 1_ / / / runpuunrrrrr v e z I / 1 --T\ W. MAGNOLIA STREET (10Dr RIGHTI)F-WAY) / / / / r / EXISTING BANK BUILD9S.MNDFURAS AIN (318 S. MElDR11M STREET) \\OW6 K3 y^ fTF \ NRAWTWIR' R'ZUr 0� 1 I I� I � G / % 1 1 \\ APPNOXMAIE W13 \ a dsTMreANM I I N / / � I 1 APPROXIMATE L ITS _ OF DISTURBANCE =0.64 AC — h P PROPOSED BUILDING _ B f4a • • • • • • a000aaasommo�-� ® NORTH m o m w 6D Fort (REFER) Ftll - m I LEGEND: — ROW UNE — — — PROPOSED PRRFRTY UIE 5010 EXISTING CONTOUR — 20 — PROPOSED CONTOUR — PROPOSED 9AWCUT WE PROPOSED L£FTCK CURB AND DUTIES "DAL) EXISTING CURB AND SUTTER RQARAIN RttDWAY �O !LT fE MZ OP IINEF WOTECTION ® O WI m O WATTLE $ MT MAN ® ® VENIC E m.A G PAD NOTES 1 UTILITIES IEES ME PPPONROWLOCATION EN MRAIIOF ALL NON THEM DRAWINGS IT WALL BE ME RESPONSIBILITY OF ME CONTRACTOR TO 'VERIFY ME DISTENCE OF All UNDETUIROWD UTUMS IN ME AREA OF ME MINN. STORE WIMMENONG NEW CONSTRUCTION. ME CONTRACTOR µy1 BE RESPONSIBLE FOR LDCATNG All UNDERGROUND LEI D SMALL BE RESPONSIBLE FOR ALL UNNNONN UNDERCAOIND LTUTES 2 FROSON CONTROL PR.AZIMS, SITE PROTECTION, AND REYEGETATON METHODS SMALL FOLLOW CITY REOIUTIONS ] IT SHOULD BE NOTED THAT ANY ERDSW CONTROL PLAN SER ES ONLY AS A WIDELNE TO ME CONTRACTOR. STAONG AND/OR PHASING OF MST MANAGEMENT PRACTICES (BMI IS EYPECTEO. ADDITIONAL ANO/OR DIiTERENT WP. FROM TROY ORIGINALLY MI MAY M NECESSARY DURING CONSTRUCMXN DUE TO CHANGING STE CONDITIONS ON AS REWIRED BY LOCAL WMI • NIS FFOSON CONTROL PLAN IS SWEMATC IN NI AS SUI LAAPHICAL SYMBOLS MAY NOT BE TO BGM, NOR ME THEY NECESSARILY SHOWN IN NOR EXACT LOCATION. 5. ME CONTRACTOR SHALL BE RESPONSIBLE FW All PERMITTING (OT,, STATE DISCHARGE PERMIT, ETC) AND COMPLIANCE MTH GOMERNING UMCRIMS. It SHALL BE THE RESPONSIOUT OF ME CONTRACTOR ERIANTUMEDNMLD ON CONTROL MEASURES REP WflLYMINTANFOOE 6 CONTRACTOR SHALL IMPLEMENT ME .U9RORIAIE EROSION CONTROL MEASURES ACCORDING ME ME CWSTRUCMXN YWEIICNG AND LEVEL Of S'TE STABILIZATION. ]. CONTRACTOR SHALL IW UEMENT APFAmRUTE INLET PRoiECn pl FOR ALL STORM DRAINS UNTIL BUT IS FULLY STABILIZED. INLET LAOI SYAll BE ADMIEL, AS NECESSARY, TO ME WRRWNDING SURFACE TYRE AND CONDUION (I+. STAKEDRIWN WATTLES FM BARE SOL SAND BAGS OR WAAEL SOTS FOR PAYDIENt, ETC.) B. COAMACTOR SMALL IMREYENT M!"AWMAIE PERIMETER PROTECTION FOR AREAS DIRECTING DRAINAGE OTSTE. PERIMETER PROTECTION SHALL BE ADAPTED AS NEMSSARY, TO ME SRROINWO WRFAM TOPE AND CONDITION (I.a, STAXE-OMAEN MOMENT CONTROL LOGS ON SIT FENCE FOR BALE SOLO SAND BAGS OR DRAWL SMAS FOR PAVEMENT, ETC) 9. CONTRACTOR IS RESPO9BLE EON STABILIZING ALL AWES, TWLARLY NOW SLEEPER MAN 6:1, COMP MULCHING, HYDRO MULWING EROSION MARE TEMPORARY IRRIGATION. AND ADUMONAL WATTLES ON SLT FENCING MAY M NECESSARY TO ESTABLISH NEMTAMA WINDS AND STABILIZE ME ROPE. 10. SEE LANDSCAPE PLOPS FOR ADDITIONAL INFORMATION ON PIANTxc REVEGETATON, HARDSCAPE AND ONES FIRMAMENT SIT STASUZATON NEMODS. CALL AT L IILIUTW NMROI GRADO NmwwTafsbE1CM Cull Word you e�IR. r i i i 1 l� �S• Wt1i80. rt` ' 1 NorthernEnaineerina.<om // 970.221.4158 Noo ��Y.'L4.6TS1X r�'SS.� �x�rr-ssaacnva�•L.- _ M 5L SF —M— SILT FENCE IP .r:s pow MULT II II I e m NNuv V IP �l /Il l ll. Illl — Ill Ill l I I l Ill lI az CURB INLET PROTECTION o3 DROP INLET PROTECTION NOT TO SCALE NOT TO SCALE NOT TO SCAR I d__. - _= .� � smmmuu pe.s (1 WATTLE INSTALLATION NOT TO SCALE .e."��5 �.......® ..«. CWA os VEHICLE CONTROL TRACKING PAD �001 CONCRETE WASHOUT AREA NOT TO SCATE NOT TO SCALE KNAL.wnNrsbebw. Call bNwe you Olg. ZU' afZ a� W� s =W W �Z p O" Zw yE € S„ .9 3 e_ as Sheet C6.01 Of 3 Sheets a err NorthernEnninearina.com // 970.221.4158 wops delrkise. hIW u41976u. 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